I just redid the entire rear end fuel delivery, including fuel filter, accumulator, new line between the pumps, and new pump backflow valves. Everything hunky dory, but a after a few weeks I got a fuel smell coming from the front.

I discovered the leak: found dampness below the EHA valve by the fuel distributor. I have two questions:

1. Is this coincidence, or did my work in the back restore fuel pressure to a higher level, causing the leak in the front?

and

2. What is the likelihood that it is just the o rings underneath the EHA, and that I don't need to replace the entire valve? Car has about 130,000 miles on it.

I'll still go with the o rings first, because they are so cheap. But I am now going to research on how to adjust a new EHA. Thanks!

Re: EHA adjustment

There is, to my knowledge, nothing in any service manuals, factory or aftermarket, that describes a process for adjusting the EHA. That said, one could make an adjustment of the actuator current after bringing the CO percentage into spec if the current were at that time out of spec. My understanding has been that the EHA is set by the manufacturer for a specific flow rate at a specific current; field adjustment is not anticipated, hence, no instructions in any manuals.

Tried about 4 used EHA valves that my mechanic gave me a warranty on them for leaks. So far, 3 leaked (and caused high cold start idle speed), and the 1 that didn't leak and didn't cause a high cold start idle speed instead caused the car to run poorly it bogged down on take off - pretty dangerous when the guy behind is about to accelerate too.

So I put back the old leaking one (it's leaking from the body seams of the EHA unit itself), as well as in between the distributor and EHA housing. The power is back, no more bogging down on take off. Actually currently waiting on the new EHA ($266 for new one, with 2 O-rings included) to arrive this week.